Disappearing window-screen.



1; A. BRIDGES. DISAPPEARING WINDOW SCREEN.

APPLICATION FILED JAN-6 l9l5 memed Oct. 5,1915.

IN VEN TOR, Jase Ma Mg. Bmidyea WITNESSES JOSEPH A. BRIDGES, OF SANFRANCISCO, CALIFORNIA.

DISAPPEARING WINDOW-SCREEN.

Application filed January 6, 1915.

To all whom it may concern:

Be it known that I, Josnrn A. BRIDGES, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in DisappearingWindow-Screens, of which the following is a specification.

One object of my invention is to provide simple and inexpensive meansfor balancing window sashes, whereby, when either sash is movedvertically, the other sash will. also be moved vertically in theopposite direction. Again, a window should be open both at top andbottom in order to thoroughly ventilate a room, and both openingsshould, in hot weather, be closed by fly screens. To do this usuallyrequires four operations.

A further object of my invention is to provide an improved attachment towindow sashes by means of which the above result can be accomplished ina single operation.

In the accompanying drawing, Figure 1 is an inside view of an openwindow embodying my invention; Fig. 2 is a vertical section thereof onthe line 22 of Fig. 1; Fig. 3 is an enlarged sectional View on the line3-3 of Fig. 2; Fig. 4 is a cross section on the line M of Fig. 3.

' Referring to the drawing, 1 indicates a window frame, in which canmove vertically a lower sash 2 and an upper sash 3. Said sashes 2 and 3are operatively connected to move in unison by means of upper and lowerpairs of cords 4 and 6, connected respectively to the upper and lowerportions of the sashes, and passing respectively around upper and lowerpairs of pulleys 7, rotatably mounted in blocks 8 secured to the windowframe. By means of this arrangement, when either sash is movedvertically in one direction, the other sash is also moved vertically inthe opposite direction, and the sashes are thus balanced. The cords 4:and 6 are, however, connected to the sashes by means of loops at theends of said 'cords passing over hooks 9 secured to the sashes, andthus, by detaching said loops from the hooks, the sashes can bevertically moved independently of each other.

In the inner surfaces of the lower rail of the inner sash and the upperrail of the outer sash are secured studs 11 which can enterkey-hole-shaped slots 12 in sheet-metal hooks 13, pivotally connected.as shown at Specification of Letters .Zatent.

Patented (let. 5, 1915.

Serial No. 808.

14, to links 16, which are pivotally connected, as shown at 17 to endbars 18 of flexible screens 19, which are wound upon hol low rollers 20,bars 21 at the other end of said screens having hooks 22 which engageslots 23 in said rollers. Said rollers are contained in casings 24located respectively at the upper and lower ends of the window frame,and are automatically rotated, to wind up the screens upon-the rollers,by

means of springs 25, coiled around fixed rods 26, and secured at one endto said rods and at the other end to ends of the rollers. These springs,by rotating said rollers, automatically wind uptthe screens when thesashes are moved iggthe directions toward the respective rollers.

It will be seen that, with this construction, when the window is open,the screens at both top and bottom, are automatically extended to closethe opening between the top and bottom respectively of the sashes andthe top and bottom of the window frame, so that it is impossible forflies or other insects to enter the room when the window is open.However, when desired, either screen may be detached from its sash bydrawing out the screen until the studs 11 on the sash project throughthe wide parts ofthe slots 12, and then the sashes can moveindependently of the screens. The hooks 13 can then be hooked in holes27 in the casings 24.

28 indicates a cam pivoted upon the inner sash, and which can be used tolock the inner sash, and therefore also the outer sash, in any positionto which it has been moved.

It will be observed that very little change is needed to apply myimprovement to win dows of the ordinary style.

For this pur-' pose it is necessary only to cut off a shortpiece of thetop of the parting bead between the two sashes and rest the upper casing24 Y upon the tops of the parting beads and against the inner surface oftl of the window frame, as clearly shown in Fig. 2, and to cut off ashort portion of the bottom of the inner stop and insert the lowercasing '24 below said stop, as shown in Fig. 1, and

ends of the window frame and a cord around each pulley connected at itsends to said sashes, upper and lower flexible screens connected at oneend with the upper and lower rails respectively of the upper and lowersashes, and upper and lower rollers around which the upper and lowerscreens are respectively wound.

2. In combination with inner and outer sashes of a window, pulleys atthe upper ends of the window frame and a cord around each pulleyconnected at its ends to said sashes, upper and lower flexible screensCopies of this patent may be obtained for detachably connectedat one endwith the 'upper and lower rails respectively of the uping witnesses. t

V JOSEPH A. BRIDGES. \Vitnesses FRANCIS M. WRIGHT, D. B. RICHARDS.

five cents each, by addressing the Commissioner ot Patents. Washington,D. 0.

